Everything posted by pTrevTrevs

Scipio 5 launches from KSC with no problems and reaches its parking orbit as usual.
A short while later, the spacecraft is cleared for TLI and is on its way to the Mun within half an hour after launch. Due to the time window necessary for both lighting conditions at the landing site and for Marius to pass over the landing site, Scipio 5 is using a special "fast-track" trajectory, which can get the spacecraft to the Mun in less than three hours, at the expense of safety and margin for error. Fortunately, Scipio and Princeps have both flown enough times by now to keep the likelihood of a problem occurring at a minimum.
During the flight to Lunar orbit, the crew was able to capture several astronomic phenomena on camera, including this sequence of the sun rising over the Mun's horizon, recorded from the Command module's round hatch window. The Sun's corona is visible for a few moments before the rest of the star is above the horizon, at which point the window is flooded with light.
The crew also captured a photo of Minmus shortly before Lunar Orbit Insertion. The dwarf moon is one of the potential future targets for extended space missions being investigated, and it will likely be the site of the next manned missions to a celestial body other than the Mun.
Scipio 5 arrives in Lunar orbit and begins its rendezvous procedure. Time is at a premium, in order for the crew to arrive at the station in time to land when the sun is just rising over the landing site, when the terrain features will be most visible.
Fortunately, just like Princeps launches, rendezvous operations with Marius are by now routine, and the crew has no issues making their way to the station on time. This photo was taken from the Command Module's forward-facing windows, which are used as a backup for the camera systems typically used for docking.
Scipio 5 completes its docking successfully and the crew boards the station. After a brief rest period, they will power up the lander and descend to the lunar surface.

Progress continues with the launch of the first Nerva rover onboard an Aurelian cargo lander. The spacecraft also carries a set of scientific instruments and a high-gain communications antenna which will be assembled by the crew on the surface. This is the beginning of an upcoming series of surface expeditions intended to find a suitable location in which to construct a permanent base.
The weight of the lander requires its launch vehicle to be much larger than the Princeps rocket, which so far has been the workhorse of my lunar expeditions, launching both variants of Scipio spacecraft and nearly all modules of Marius. Therefore I've commissioned a new booster, the Centurion, derived from the Princeps design, but much more powerful. It quite obviously takes real-life inspiration from the Ares V, although unlike the Ares I plan to have the SRBs be modular, and Centurion may be launched in future with more SRBs or even without any SRBs.
For historical context (since I've been giving some for each name I use), a Centurion was the commander of a Roman century, a formation of soldiers consisting of 80 men. Each century would be divided into ten "contuberniums", of 8 men, similar to the organization of squads into platoons in modern militaries. The term "century" is a bit of a misnomer, since one would assume that such a formation would consist of 100 men, not 80. However, a century actually had 20 noncombatant members, two to each contubernium, which would assist the men with carrying supplies, preparing food, maintaining the century's pack mules, etc. Therefore, while the actual on-paper strength of a century was 100 men, only 80 were combatants.
Anyway, while the launch vehicle propels the spacecraft up to and during TLI, the lander's engines are responsible for any mid-course corrections, as well as the Lunar Orbit Insertion burn. I normally don't like to design craft like this, but the Aurelian frame was built to be reused, and thus it has a pretty significant margin for error when it comes to fuel usage. The cargo lander will never have to make an ascent from the surface, so the fuel that would have been used for that on a manned lander is instead used for the flight to the Mun.
For this first crewed expedition with the new rover, I'm aiming for a pretty well-known Easter egg, which can be seen in the background of the above photos, but for the sake of avoiding spoilers, I won't reveal where exactly on the Mun the landing site is. The locations of all Easter eggs are available on the wiki in case someone is interested in them. Funnily enough, I knew the general location of this Mun Arch, but not its exact location. I'm pretty proud of the fact that I was able to make a targeted landing without even knowing the location of my target.
The next launch will carry the landing crew to lunar orbit, where they will take command of Aurelian 2 aboard Marius and descend to the surface. They will attempt to make a pinpoint landing near the cargo lander, then unload the rover and the other surface hardware. They will make multiple EVAs, one of which will be devoted to a drive to the nearby Mun Arch, the main attraction of this entire landing site. The rover will remain on the surface, and it will possibly be used for future surface expeditions, especially if this site is chosen as the location of the planned permanent surface base.

A second Scipio-ST has been launched to the Mun, its main cargo being fuel for Aurelian 2, which will enable it to perform its first surface expedition.
By now rendezvous and docking with Marius are nearly routine operations, and the approach procedure was handled without any problems, despite the growing size of the station and the footprint its part count is starting to leave in my RAM.
Refueling Aurelian 2, however, is something I've never done before, and it proved to be quite tedious, with the numerous fuel tanks I needed to manage on both the tanker and the lander. ST-2 docked on the opposite end of the station from Aurelian 2, and because of that, it became a little difficult to switch through all the tanks that needed attention, although the "Aim Camera" option proved useful.
ST-2 also delivered materials for the station's exterior, including two tether cables and four mounts for cargo containers. Following the refueling, the engineer onboard the station was sent outside to unpack and install the newly arrived hardware.
First, a new radiator intended to help cope with the demands that will be placed on the station by future expansions, as well as the refinery I intend to add to it eventually.
Next, the four cargo mounts to store extra EVA fuel canisters, extra tools, parts such as reinforcement struts and fuel pipes, etc. Two mounts are on the forward node, one on the core module, and one more on the docking node, near Aurelian 2's berth.
The last piece of equipment to be installed are the tether cables. These will allow Kerbals to anchor themselves in place while working on the station or installing new equipment and will make it much harder to drift out of range of a container while working inside it. They can also be used to tether a craft to the station if for some reason the two vessels must remain undocked yet near each other.
Once both cables are installed, a few unnecessary or superfluous parts are removed from Marius and Aurelian 2 and stowed in ST-2's cargo bay for disposal. One storage box is moved to the station, while the second is used for trash disposal on the Scipio ST.
The next lunar mission will be a cargo lander, delivering a rover and surface equipment for Surface Expedition 1, and after that, the crew itself, which will take command of the lander onboard the station before descending to the surface. Additionally, I have a few unmanned interplanetary missions planned, some in preparation for future manned missions to Eve or Duna, and some with other goals.
I hate to jinx it now, but I think I'm finally cultivating a newfound interest in playing this game, maybe soon I won't even have to force myself to do so.

I have lots of images to share for this, most of them because of how a e s t h e t i c they are, so I'll split them up into two or more posts. Also, i have a lot of photos of the new launch tower to showcase.
One more time, I want to thank @AlphaMensae for the Modular Launch Pads mod, it really is a godsend.
This is Scipio 4, the first flight of Scipio Block II, and the first mission to Belisarius. The crew will install a set of instruments, transfer over construction hardware for use on future missions, and attach a safety cable for EVA tethering and other such things. This mission will also ensure that the new hardware being used in Block II is suitable for long-duration spaceflight to the Mun and beyond.
4 am: The crew boards the transport van outside the astronaut complex and depart for the launch pad. Once there, they pressurize and perform final checks on their suits, and await clearance to ascend the elevator and board the spacecraft.
6 am: The crew is given clearance to proceed to the spacecraft, and boards the elevator on the side of the mobile launch platform. Once on the launch platform's deck, the crew proceeds to the tower elevator and ascends to the crew access level.
Once atop the service tower, the crew crosses the access arm to the white room, where the pad closeout crew helps connect their suits to the spacecraft environmental system. The crew then boards the craft, and after ensuring that the ship's control panel is set for liftoff, the hatch is closed and the crew is sealed in the spacecraft.
7:30 am: With twenty minutes to go before launch, the crew access swing arm is retracted. If the crew is forced to abort now they must either wait for the arm to be reconnected with the Command Module or use the Launch Escape System to quickly propel themselves away from the pad.
7:50 am: Launch countdown proceeds with no issues and the vehicle lifts off on schedule. As the engines are ignited the swing arms are retracted and the hold-down arms on top of the milk-stool disconnect, allowing the booster to begin its one-way journey.
Launch proceeds without a hitch, the first stage burns out and separates as normal, and the escape tower is jettisoned. The second stage pushed the craft further, and the orbit is completed with the third stage. Gotta say, I'm liking this new Mark 1-3 command pod, it's IVA is way better than the old one.
The crew immediately begin setting up their rendezvous with Belisarius, and it takes about a day to complete, given the need for plane corrections and the starting distance between the two ships.
The docking proceeds normally, and the crew inspects the pressurized portion of the telescope. The station has two sleeping stations inside, but for safety reasons, one crewmember will remain in the command module at all times, unless an EVA is in progress, in which case the two crew still inside will monitor the spacewalk from the telescope. The mission will last about three days, enough time to test the telescope's hardware, perform an EVA to install the mission's hardware, and perform other scheduled tests.

Quite a lot of progress to report this evening, with my last final over with, I have a fairly clear schedule for the coming week, so maybe the pace will continue to be this brisk.
ST-1 has been jettisoned and disposed of by crashing it on the far side of the Mun, away from any possible future landing site.
Aurelian I has likewise been disposed of, somewhat sadly. There was some debris left from the crash, so maybe I'll send a landing crew there to retrieve some of it and try to ship it back to Kerbin one day. For now, though, the ship which I had thought had such a useful and bright future ahead of it is nothing but scrap metal on the floor of some nameless crater.
On a brighter note, Aurelian II has arrived at Marius. It will need to be refueled before a crew can take it to the surface, but it's otherwise ready to go. The Orbital Expedition 1 crew will be departing soon, and when Orbital Expedition 3 arrives at Marius they will oversee the first landing of this new and improved ship.
Now for the biggest update; I have launched an orbital telescope named Belisarius, which will not be permanently crewed but has a pressurized workspace for crews to conduct experiments and servicing work on the telescope. The next Scipio flight, Scipio 4, will fly to Belisarius rather than the Mun, as it will be the first Block II Scipio, and will need testing in LKO before tackling a destination such as the Mun.
The telescope is named for Belisarius , a Byzantine (Still Roman, change my mind) general who led Eastern Roman forces in Justinian's reconquest of the Western Roman territories which had fallen to barbarian invaders such as the Vandals, Ostrogoths, and Visigoths less than a hundred years before. His extremely successful military career is often considered comparable to Hannibal's or Napoleon's.
That launch tower you see in the first photo is from this very awesome Modular Launch Pads mod, made by @AlphaMensae . You'll hopefully be seeing a lot more of it in my posts here, I've been waiting for something like it for literally years now.
Before anyone speaks up, I realize now that the Sentinel telescope part can only be used in solar orbit. This makes Belisarius utterly useless, unfortunately, but I was not aware of this limitation until I had the telescope in orbit.

I've made a modernized version of Aurelian, with the new foil-clad fuel tanks to save on part count and make refueling easier. The number of engines has also been decreased from four to two, and the RCS's fuel tanks have been relocated from the frame containing the other propulsion equipment to the sides of the cabin, to make room for more fuel tanks. it doesn't have quite as much DeltaV as the original version, but it's not enough to matter. This second lander is currently on its way to the Lunar station where it will be outfitted for its first surface expedition.
Meanwhile, the station is finally preparing to jettison the Scipio-ST cargo tanker to make room for the arrival of Aurelian II. This will involve jettisoning the original Aurelian, as it is no longer needed or useful, as well as moving the Scipio currently occupying the nadir docking tunnel to the berth currently occupied by the tanker. This will allow Aurelian II to connect to the docking tunnel avoiding the awkward clearance issues encountered during the last docking with Aurelian I.
I still need to reoutfit Scipio with the new Mark 1-3 Command Module and the new fuel tanks, and the next spacecraft to arrive at the station will be modernized to the new 1.4 standards. The two Scipio ships currently at the station will be the last of their kind to make use of the Mark 1-2 Command Module and stacked toroidal fuel tanks.

Test driving a new rover, christened Nerva, intended for longer duration Lunar missions. It carries up to four Kerbals technically five, counting the seat on the back utility platform, but that seat is intended more for trips with frequent stops, where crew will be disembarking often for maintenance or exploration, and will not be used when not necessary. Its top speed on Kerbin is around 20m/s, but I'm expecting much lower speeds on the Mun due to lower gravity and added caution forcing me to drive slower anyway. Its name comes from Emperor Nerva, the first of the Five Good Emperors of Rome, all known for their exceptional leadership abilities and the prosperity Rome experienced during their reigns. Nerva reigned for a relatively short period and was most known for the dynasty he created rather than his reign itself, which is why I'm using his name for such a small piece of hardware rather than something bigger.
It's supposed to look pressurized, but of course, it isn't.
In addition to the smaller panels lining the sides of the rover, it carries two larger panels for faster charging during stops. Its main antenna is carried on the rear utility platform, as well as a biome scanner, a jump seat, and a towing bar (since I decided to bite the bullet and get KAS/KIS to make base construction easier). There is also a thruster block on top of the rover which is used to prevent tipping during turns.
Right now the plan is to attach one of these to a cargo variant of Aurelian for the next Lunar surface mission. I will first have to reoutfit Aurelian with the newly added gold foil tanks since the toroidal ones I originally used in 1.3 make it a pain to refuel. This probably means that the lander docked to Marius will have to be retired and disposed of.

Well, to give you an idea of how out of touch I am (despite actively trying to get back into the game), I wasn't even aware of the 1.4 update, and when I heard about it, I assumed it was simply a bugfix and not worth updating to it. I don't have the game on steam and simply download a new install from the KSP website every time I need a new version (probably an easier way to do it, but I haven't really bothered to try).
Anyway, I have made the switch now, and I changed up my visual mods as well, from SVE to Astronomer's Visual Pack (thank God for that RAM upgrade I got myself for Christmas). There's still not too much to show, but I flew Scipio unmanned to the orbital station and docked it to its berth on the docking module on the station's nadir.
Meanwhile, the crew on the surface began their EVA, accompanied by some pretty great new visuals (too bad they make my already-dismal FPS even worse).
The lander doesn's look all that big in the VAB view, but having a Kerbal stand next to it gives you an idea of its size. It needs to be bigger than something I would normally construct for such a landing mission, because it's meant to be reusable, and I can't leave part of it on the surface to save weight.
I didn't have any kind of equipment to assemble on the surface, and exploring the landing site in-depth wouldn't be practical because I had three Kerbals to manage and no rover or flyer to transport them, but I did Valentina to the rim of a small crater nearby to plant another flag to mark the furthest point of excursion.
Unfortunately, using the EVA jetpack to make long trips like this is kind of dangerous, and also tedious to keep the Kerbal in the air without hitting the ground and bouncing. In the future I plan to send rovers to the surface to allow longer and safer exploratory trips, and maybe I'll even send another crew back to this crater complex to give it a closer look. Maybe I'll also get KAS/KIS and SEP to give me something to build once on the surface...
With the EVA concluded, the crew re-enters the lander and begins the closeout procedure and liftoff preparations. The ladder is retracted and the surface probes are extracted from the soil, they will be re-extended for the next landing.
Around half an hour later, Aurelian is airborne again, racing to catch up with Marius in orbit and finish its first expedition.
(By the way, I think I may be having an issue with RealPlume, if you'll notice how the engine effects originate from the combustion chamber rather than the end of the nozzle, where it should. I don't know what the cause of this may be.)
About two orbits later, the spacecraft meets up with the station and prepares to dock. Unfortunately, I had not yet pumped all the fuel out of the cargo tanker occupying the only other berth ideal for such a large (and ungainly) craft as Aurelian, so I had to attempt to dock to the nadir port on the Core Module, dangerously close to the second Scipio spacecraft.
I had not intended to use this port to house Aurelian, so I had some issues with a radiator panel and thruster on the Core obstructing access to the port, and in the end I had to back the spacecraft away from the port, rotate it so the thruster would have room, and dock is in this lopsided position. In the future I will not attempt to dock so many ships at the station unless I can get more ports with sufficient clearance to allow an easier approach.
This is the station's current configuration, with Scipio-ST 1 on the far left, Scipio 2 on the far right, Scipio 3 occupying the nadir docking tunnel, and Aurelian crammed in on the Core's nadir berth. Scipio 2 will soon be departing with its crew and the landing crew which has just arrived in Aurelian will take over command of the station as Orbital Expedition 2.
The station is getting kind of big, I hope I can still afford to add all the modules I had planned. Every now and then the station will fall prone to Kraken attacks, but I can usually catch them with time warp. The real problem with that is that it makes the station almost impossible to move without causing wobbling and shaking throughout the entire assembly, despite having nearly every part autostrutted.
I may take a break from lunar operations for a while, I believe there is an Eve transfer window about to open up, and I may send a probe there to map it for resources or prepare for a potential manned mission to Gilly. Alternatively, I've been wanting to send a smaller station with an asteroid telescope into a high altitude inclined orbit to search for asteroids. The station would not be permanently manned the way Marius is but would have a pressurized cabin for accommodating short-duration visiting crews for service missions or for testing new variants of Scipio or other spacecraft closer to home than the Mun.
By the way, thanks to @kerbalstar for letting me know about the update, I'd still be on 1.3 if it weren't for him.

Thanks, I'll try and work some more on this today or sometime this week. Can't promise anything though, it's the last week before AP Exams start hitting, and I've got to make my last month of school count.

Oh man, it's been a month and a half since I've given any mind to this. I've been swamped with work most of the time, and my spring break was taken up by a vacation to Hawaii (it was very nice, by the way), as well as a college visit and spring cleaning, but now I have some time and there isn't any other game I wanted to play today, so I got to come back to KSP.
I continued the test flight of Aurelian, the next phase of the mission involves sending up a crewed Scipio to tow it to the Mun. I'm using a new, smaller and more efficient booster for the Scipio, consisting of three less powerful stages and no SRBs.
The third stage is still concealed in a fairing, due to its smaller diameter.
The Scipio rendezvoused with Aurelian and the still-attached upper stage propelled both ships out of Kerbin's orbit and was then expended.
Scipio's engine was used for course corrections en route, but the lander's engines were used for the orbital insertion due to the lander's higher TWR compared to the single engine on Scipio.
One revolution after entering orbit, the crew powered up the lander and undocked for descent. This landing will be relatively simple compared to future ones, and is intended more as a test for the lander systems instead of a serious scientific expedition. Scipio will be controlled autonomously and will proceed to dock at the Marius space station, where it will be refueled and await the arrival of the crew, which will arrive at the station after completing their surface mission, where they will relieve the current crew.
The descent and landing went smoothly, with no hitches. I was able to put it down right in the middle of a crater I picked out from orbit, and then hovered and maneuvered the craft to a precise landing on flat ground, which I'm quite proud of, considering how rusty I am at this game.
Hopefully, I'll have the time and inclination to continue this soon, but my schedule is still extremely unpredictable, and likely will be until mid-May. Truthfully, I'm not even aware what the current version of KSP is, it's been so long since I've visited the forum or played the game...

I guess I should give some kind of update for this. I'm not dead, but I've been swamped with work from school, as well as scholarship applications since it's that time of year. I was able to play a little today and make some progress. I launched the lander on a test flight and gave it the name Aurelian, after the 3rd Century Roman Emperor who suppressed the Gallic and Palmyrene Empires which broke off from Rome in the midst the 3rd Century political crises. He was killed by the Praetorian Guard after they were given a fake list of people Aurelian supposedly intended to kill which had the names of several Guardsmen on it.
Anyway, here's a picture. I meant to take this all the way to the Mun, but realized once I got it into orbit that I forgot to install the RCS on the lander itself.
I also made a few changes to the Scipio spacecraft and developed a smaller, more efficient rocket for it than the Princeps I've been using for almost all flights, but I forgot to take a picture of it.
Sorry for taking so long to get just this little bit up, but work must come before play, and it's more important that I get my education paid for than it is to finish a project in a video game.

Not much to show here, but since it's been a few days I'll show the docking module I added to the orbital station. This will be the primary berth for the lander, but can also serve as a secondary berth for Scipio spacecraft or anything else.

Right then, another update, since I've been neglecting this lately due to schoolwork.
The second communications satellite (Cato the Younger) is in place, and now I have a completely filled in communications network for short to mid-term lunar operations. As some have pointed out these satellites won't stay in place forever, so I will need to find a more permanent solution to the blackout problem on the far side of the Mun, but until I do these satellites will work perfectly.
I've also begun designing a reusable lander for future surface missions. Its normal flight crew will be three, although it can technically hold up to five (the seat in the lander can is intended as an airlock. Because of this extra space, it will be able to hold three Kerbals in relative comfort for a period of several days. The station currently isn't capable of servicing this lander because I have yet to add the extra crew space and the docking module necessary to allow comfortable and convenient movement of the lander and its passengers around the station, but once that's done I will start test missions of the lander by flying sortie missions to the lunar surface. Having completed that, I will develop a variant of the lander for delivering rovers and temporary living quarters to the surface, and after that, the platform will also be adapted for the construction of permanent bases.
Oh, I also need a name for the lander, I'm still working on that part...
I can't say how much I'll get to work on this because the spring semester has hit me like a freight train and I'm doing my best to keep up. When I do get a chance to play, I often feel like playing other games, but to be fair, that's the reason I started this project in the first place.

That’s true, but I don’t need these satellites to last forever, just long enough to establish a crewed base on the far side. That will more or less make the satellites redundant since I can have the crew there control unmanned ships out of comms with Kerbin.
At any rate the satellite does have ion engines for minor orbital adjustments to keep it in position.

An unexpected increase in my workload accompanying the start of the spring semester has left me unable to play KSP or anything else at all this week, however I have time right now for a brief update.
This is the first of two Cato satellites (this first one is named Cato the Elder) placed in an orbit equal in size and inclination to the Mun's, but outside its sphere of influence. This way I can have reliable and consistent communications with ships passing around the far side of the Mun. Previously this gave me slight issues with control over station modules when performing orbital insertion burns. Cato the Elder is placed in front of the Mun, leading it, while the second satellite Cato the Younger will be placed in a similar position behind the Mun, trailing it.
The communications range is already greatly expanded with this one satellite, the second one will ensure that no spacecraft in lunar orbit will at any time be without communications or full control authority.
With the weekend approaching, I may be able to have more time to work more on this, although I can't say for sure.

I realized that I had not shown the tug being moved back to its normal berth on the end of the truss after installing the solar arrays, so here it is now. The tug will remain here until it is required again, whether to rescue a dead ship or to install another station component.
In the meantime though, the first Scipio Supply Tanker (ST) is being launched from KSC. Although the timing for the arrival of the solar truss allowed me to guide it directly from the station instead of relying on probe control, the conditions for rendezvous were actually quite bad, and I used all of the module's monopropellant attempting to complete the procedure. The Scipio the Expedition 1 crew arrived on it also short on fuel and monopropellant, so this ship will be delivering sorely needed propellant to both parts of the station. I'm not using any mods other than visual/sound mods, so the Scipio ST serves no other purpose than propellant deliveries, which will eventually be made unnecessary by ore shipments from the surface, but I think I'll keep one attached to the station at all times for looks.
The Scipio ST uses the same service module as the other Scipio variants, with a new liquid supplies module in place of the descent module, intended to carry fuel/oxidizer, monopropellant, and xenon gas for when I begin using ion-powered flyers for the lunar base (because I really want to try that). The pressurized cargo module at the front is derived from the Scipio orbital module but has a few changes, namely the removal of an airlock hatch and the forward facing docking window.
Arrival at the Mun.
One rendezvous later the station is in sight. Typically what I do for docking is align the station along its prograde vector, so I can tell whether the incoming ship is properly aligned or not. Unfortunately, the addition of the solar truss has made the station very slow to maneuver, so I may have to stop doing this soon.
ST-1 is now docked to the station, and will remain onboard for the next few weeks, while cargo is moved over, propellant is pumped onboard, and trash is loaded into the PM. Once the ship undocks it will be directed to crash onto the far side of the Mun, so any debris will not be a future hazard to any future landing sites on the near side.
With that complete, Bill Kerman now performs the first spacewalk from the new station, egressing from the Scipio's orbital module due to the current lack of a dedicated airlock.
The station currently has three external workstations (command seats); two on the core module and one on the solar truss. They are intended to provide rest areas for long EVAs and to allow spacewalking Kerbals to work on projects from a stationary position, without needing to worry about holding onto a ladder or floating around. (They serve no practical in-game purpose and are meant mostly for decoration and greeble)

You know, I've actually tried something like this once before, I wasn't able to get very deep into the atmosphere before the craft started to heat up and it fell out of orbit quite easily. If I tried it again I would put it in a hyperbolic orbit so that it has enough momentum at periapsis to fly through the atmosphere and return to space. The problem with that is that it necessitates a lot of fuel, not only to achieve the hyperbolic orbit but also to rendezvous with the orbiter afterward.

I think my first attempt at an interplanetary mission should be to Eve, it will take less time and is easier to reach, and also gives me an excuse to not actually have to land on the surface, since its hard to make a working crewed lander for Eve that also looks realistic. Also, Gilly's low gravity will be interesting to play in.
For now though I'm going to concentrate on establishing a base on the Mun, it's the first step.